Python 3.x 使用我在类的构造函数中创建的列表?
为什么在尝试运行get_average()方法时,它会说我不能在其中添加“int和grade”?我知道这可能是必须的,因为它们是两种不同的类型,但我只是想知道如何修复它 最后,我的问题只是想知道如何修复我的代码,这样我就可以将这个人的分数添加到一个列表中,然后对其进行平均或显示,我正在努力解决如何做到这一点Python 3.x 使用我在类的构造函数中创建的列表?,python-3.x,oop,object,methods,constructor,Python 3.x,Oop,Object,Methods,Constructor,为什么在尝试运行get_average()方法时,它会说我不能在其中添加“int和grade”?我知道这可能是必须的,因为它们是两种不同的类型,但我只是想知道如何修复它 最后,我的问题只是想知道如何修复我的代码,这样我就可以将这个人的分数添加到一个列表中,然后对其进行平均或显示,我正在努力解决如何做到这一点 class Student: def __init__(self, name, year): self.name = name self.year =
class Student:
def __init__(self, name, year):
self.name = name
self.year = year
self.grades = []
def add_grade(self, grade):
if type(grade) == Grade:
self.grades.append(grade)
return self.grades
def get_average(self):
gradebook = self.grades
total = 0
for grade in gradebook:
total += int(grade)
avg = total / len(gradebook)
return avg
def get_name(self):
return self.name
def __repr__(self):
return "{p} has these grades: {g}".format(p=self.name, g=self.grades)
# student1 = Student()
# student1.attendance = {
# "11/1/98": True,
# "11/2/98": False
# }
roger = Student("Roger van der Weyden", 10)
sandro = Student("Sandro Botticelli", 12)
pieter = Student("Pieter Bruegel the Elder", 8)
class Grade:
minimum_passing = 65
def __init__(self, score):
self.score = score
def is_passing(self):
if self.score > self.minimum_passing:
return "{p} is passing with a grade of {g}".format(p=pieter.get_name(), g=self.score)
# Checking for grades and averages
pieter.add_grade(Grade(100))
#print(pieter.get_average())
print(pieter)
# Tells you if the dude is passing
# roger_grade = Grade(100)
# print(roger_grade.is_passing())
在您的学生班级中,您有一个包含
Grade
对象的成绩列表。
运行get_average()
时,它会尝试执行以下total+=int(grade)
。这会失败,因为您正试图将对象强制转换为int
您需要传入分数的int值,该值可通过grade.score
同样,您需要更改def\uuu repr\uuuu(self):
以打印出实际的成绩,而不是成绩对象的地址
这是固定代码
class Student:
def __init__(self, name, year):
self.name = name
self.year = year
self.grades = []
def add_grade(self, grade):
if type(grade) == Grade:
self.grades.append(grade)
return self.grades
def get_average(self):
gradebook = self.grades
total = 0
for grade in gradebook:
total += int(grade.score)
avg = total / len(gradebook)
return avg
def get_name(self):
return self.name
def __repr__(self):
return "{p} has these grades: {g}".format(p=self.name, g=[sc.score for sc in self.grades])
# student1 = Student()
# student1.attendance = {
# "11/1/98": True,
# "11/2/98": False
# }
roger = Student("Roger van der Weyden", 10)
sandro = Student("Sandro Botticelli", 12)
pieter = Student("Pieter Bruegel the Elder", 8)
class Grade:
minimum_passing = 65
def __init__(self, score):
self.score = score
def is_passing(self):
if self.score > self.minimum_passing:
return "{p} is passing with a grade of {g}".format(p=pieter.get_name(), g=self.score)
# Checking for grades and averages
pieter.add_grade(Grade(100))
pieter.add_grade(Grade(0))
print(pieter.get_average())
print(pieter)
# Tells you if the dude is passing
# roger_grade = Grade(100)
# print(roger_grade.is_passing())